- This, simply-ish put, is caused by because a WD cannot reach hydrostatic equilibrium. A pressure increase does not lead to increase and radius, and thus cooling, instead, it just increases heat, and thus fusion, quickly getting out of hand. Can b trigged if the Chandrasekhar Limit is crossed, as well as if a layer of H/He on top entities, called a Edge Limit Detonation or “sub-Chandrasekhar” explosions.
- In DD systems the WDs must have a small separation, causing GWR to shrink the separation until merger → SNe